US10218466B2 - Enhanced physical channel transmission method, communications device, user equipment, and base station - Google Patents

Enhanced physical channel transmission method, communications device, user equipment, and base station Download PDF

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US10218466B2
US10218466B2 US15/222,472 US201615222472A US10218466B2 US 10218466 B2 US10218466 B2 US 10218466B2 US 201615222472 A US201615222472 A US 201615222472A US 10218466 B2 US10218466 B2 US 10218466B2
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physical channel
enhanced
offset
channel transmission
information
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US20160337085A1 (en
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Zheng Yu
Xingqing CHENG
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2612—Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
    • Y02D70/00—
    • Y02D70/1262—
    • Y02D70/30—

Definitions

  • Embodiments of the present disclosure relate to communications technologies, and in particular, to an enhanced physical channel transmission method, a communications device, user equipment, and a base station.
  • enhanced transmission is used to implement enhancement of communication in a coverage area.
  • repeated transmission, spread spectrum, transmission time interval bundling, or power increase is used to perform the enhanced transmission, so as to implement communication with a terminal at an edge of the coverage area.
  • Embodiments of the present disclosure provide an enhanced physical channel transmission method, user equipment, and a base station, so as to implement enhanced transmission of different levels for different terminals.
  • an embodiment of the present disclosure provides an enhanced physical channel transmission method, including:
  • first information corresponding to each of one or more enhanced physical channel transmission levels where the first information includes repetition configuration information and enhanced transmission configuration information that are of enhanced transmission of a physical channel
  • the enhanced transmission configuration information includes one or more types of information among configuration information of a time length used for the enhanced transmission, configuration information of a physical channel transmission opportunity in a radio frame, radio frame configuration information of a physical channel transmission opportunity, cycle information of the enhanced transmission, a format used by the physical channel, radio frame offset information of the enhanced transmission, subframe offset information of the enhanced transmission, physical channel transmission opportunity offset information, root sequence index information, high-speed identification information, zero correlation zone configuration information, and frequency offset information.
  • At least one type of information in the first information corresponding to the multiple enhanced physical channel transmission levels is the same.
  • At least one type of information in the first information corresponding to the multiple enhanced physical channel transmission levels includes:
  • the radio frame configuration information of a physical channel transmission opportunity at least one type of information among the configuration information of a physical channel transmission opportunity in a radio frame, the radio frame configuration information of a physical channel transmission opportunity, the format used by the physical channel, the radio frame offset information of the enhanced physical channel transmission, the subframe offset information of the enhanced physical channel transmission, the physical channel transmission opportunity offset information of the enhanced physical channel transmission, the root sequence index information, the high-speed identification information, the zero correlation zone configuration information, and the frequency offset information that are corresponding to the multiple enhanced physical channel transmission levels is the same.
  • At least one type of information in the first information corresponding to the multiple enhanced physical channel transmission levels is the same further includes:
  • At least one type of information among the repetition configuration information of the enhanced physical channel transmission, the configuration information of the time length used for the enhanced physical channel transmission, and the enhanced physical channel transmission cycle information that are corresponding to the multiple enhanced physical channel transmission levels is different.
  • an interval of the enhanced physical channel transmission is determined according to one or more types of information among the cycle information, the radio frame configuration information, the repetition configuration information, and the configuration information of a physical channel transmission opportunity in a radio frame.
  • the method before the performing the enhanced transmission of the physical channel by using the start position in the start radio frame as a start point, the method further includes:
  • the method before the performing the enhanced transmission of the physical channel by using the start position in the start radio frame as a start point, the method further includes:
  • a system frame number SFN of the start radio frame is determined according to the enhanced transmission cycle and the radio frame offset.
  • the SFN is a value obtained according to the following formula:
  • SFN mod the interval of the enhanced physical channel transmission
  • 10 ⁇ SFN+SFstart ⁇ SF_offset) mod T 0
  • SF_offset is a subframe offset
  • SFstart is an index of the start subframe
  • T is the interval of the enhanced physical channel transmission
  • mod is a modulo function
  • SFN mod (RF_D ⁇ Rep_num/ON) RF_offset, where Rep_num is the repetition quantity, RF_D is determined by the radio frame configuration information of a physical channel transmission opportunity, Occasion_offset is a physical channel transmission opportunity offset, ON is a quantity of physical channel transmission opportunities included in a radio frame that has a physical channel transmission opportunity, RF_offset is a radio frame offset, K is a fixed constant, T is the interval of the enhanced physical channel transmission, m is an integer greater than or equal to 0, floor is a rounding down function, and mod is a modulo function.
  • the start subframe of the enhanced physical channel transmission is the first subframe in the (Occasion_offset+1) th physical channel transmission opportunity in the start radio frame;
  • an index SFstart of the start subframe is a value obtained according to the following formula:
  • the first subframe in the (X+1) th physical channel transmission opportunity in the start radio frame corresponding to each enhanced physical channel transmission level is used as the start subframe, where
  • X mod (m ⁇ Rep_num, ON), Rep_num is the repetition quantity, Occasion_offset is a physical channel transmission opportunity offset, ON is a quantity of physical channel transmission opportunities included in a radio frame that has a physical channel transmission opportunity, T is the enhanced transmission interval, nf is a number of the radio frame, SF_offset is a subframe offset, ns is a number of a timeslot in the start subframe, m is an integer greater than or equal to 0, mod is a modulo function, and floor is a rounding down function.
  • the start physical channel transmission opportunity is the (Occasion_offset+1) th physical channel transmission opportunity in the start radio frame;
  • an index Occasionstart of the start physical channel transmission opportunity is a value obtained according to the following formula, where the formula includes:
  • the radio frame offset of the enhanced physical channel transmission is 0;
  • the subframe offset is an index of the first subframe in the first physical channel transmission opportunity in the radio frame.
  • the physical channel transmission opportunity offset of the enhanced physical channel transmission is 0.
  • the determining first information corresponding to each of one or more enhanced physical channel transmission levels includes:
  • the first threshold is determined according to one or more of maximum allowable transmit power of user equipment, initial target preamble received power, an offset value corresponding to a preamble format, a power ramping step, a quantity of preamble transmission attempts, or target physical uplink channel received power.
  • an embodiment of the present disclosure provides a method for determining a physical channel mode, including:
  • the preamble sequence is received on a first resource, determining that the preamble is transmitted in a first mode; or if the preamble sequence is received on a second resource, determining that the preamble is transmitted in a second mode and/or at maximum allowable transmit power, where the first mode is a normal transmission mode or a non-coverage enhanced transmission mode, and the second mode is an enhanced transmission mode.
  • an embodiment of the present disclosure provides a method for determining a physical channel mode, including:
  • determining whether a first parameter value of user equipment is less than or equal to a first threshold where the first threshold is determined according to one or more of maximum allowable transmit power of user equipment, initial target preamble received power, an offset value corresponding to a preamble format, a power ramping step, a quantity of preamble transmission attempts, or target physical uplink channel received power; and
  • the first parameter value of the user equipment if the first parameter value of the user equipment is less than or equal to the first threshold, transmitting a physical channel by using a first resource and/or in a first mode, where the first mode is a normal transmission mode or a non-coverage enhanced transmission mode; or if the first parameter value of the user equipment is greater than the first threshold, performing enhanced transmission of a physical channel by using a second resource and/or in a second mode, where the second mode is an enhanced transmission mode.
  • an embodiment of the present disclosure provides a communications device, including: a transmitter, a receiver, a memory, and a processor separately connected to the transmitter, the receiver, and the memory, where:
  • the processor is configured to: determine first information corresponding to each of one or more enhanced physical channel transmission levels, where the first information includes repetition configuration information and enhanced transmission configuration information that are of enhanced transmission of a physical channel; determine, according to the first information, a start radio frame of an enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level and a start position, in the start radio frame, of the enhanced physical channel transmission opportunity, where the start position is a start subframe, or the start position is a start physical channel transmission opportunity; and perform the enhanced transmission of the physical channel by using the start position in the start radio frame as a start point.
  • the enhanced transmission configuration information includes one or more types of information among configuration information of a time length used for the enhanced transmission, configuration information of a physical channel transmission opportunity in a radio frame, radio frame configuration information of a physical channel transmission opportunity, cycle information of the enhanced transmission, a format used by the physical channel, radio frame offset information of the enhanced transmission, subframe offset information of the enhanced transmission, physical channel transmission opportunity offset information, root sequence index information, high-speed identification information, zero correlation zone configuration information, and frequency offset information.
  • At least one type of information in the first information corresponding to the multiple enhanced physical channel transmission levels is the same.
  • At least one type of information among the repetition configuration information of the enhanced physical channel transmission, the configuration information of the time length used for the enhanced physical channel transmission, and the enhanced physical channel transmission cycle information that are corresponding to the multiple enhanced physical channel transmission levels is different.
  • an interval of the enhanced physical channel transmission is determined according to one or more types of information among the cycle information, the radio frame configuration information, the repetition configuration information, and the configuration information of a physical channel transmission opportunity in a radio frame.
  • the processor is further configured to:
  • the second parameter is a parameter determined according to a preamble format or the enhanced physical channel transmission level.
  • the processor is specifically configured to repeatedly transmit the physical channel at each of consecutive physical channel transmission opportunities of the repetition quantity by using the start position in the radio frame as the start point.
  • a system frame number SFN of the start radio frame is determined according to the enhanced transmission cycle and the radio frame offset.
  • the SFN is a value obtained according to the following formula:
  • SFN mod the interval of the enhanced physical channel transmission
  • 10 ⁇ SFN+SFstart ⁇ SF_offset) mod T 0
  • SF_offset is a subframe offset
  • SFstart is an index of the start subframe
  • T is the interval of the enhanced physical channel transmission
  • mod is a modulo function
  • SFN mod (RF_D ⁇ Rep_num/ON) RF_offset, where Rep_num is the repetition quantity, RF_D is determined by the radio frame configuration information of a physical channel transmission opportunity, Occasion_offset is a physical channel transmission opportunity offset, ON is a quantity of physical channel transmission opportunities included in a radio frame that has a physical channel transmission opportunity, RF_offset is a radio frame offset, K is a fixed constant, T is the interval of the enhanced physical channel transmission, m is an integer greater than or equal to 0, floor is a rounding down function, and mod is a modulo function.
  • the start subframe of the enhanced physical channel transmission is the first subframe in the (Occasion_offset+1) th physical channel transmission opportunity in the start radio frame;
  • an index SFstart of the start subframe is a value obtained according to the following formula:
  • the first subframe in the (X+1) th physical channel transmission opportunity in the start radio frame corresponding to each enhanced physical channel transmission level is used as the start subframe, where
  • X mod (m ⁇ Rep_num, ON), Rep_num is the repetition quantity, Occasion_offset is a physical channel transmission opportunity offset, ON is a quantity of physical channel transmission opportunities included in a radio frame that has a physical channel transmission opportunity, T is the enhanced transmission interval, nf is a number of the radio frame, SF_offset is a subframe offset, ns is a number of a timeslot in the start subframe, m is an integer greater than or equal to 0, mod is a modulo function, and floor is a rounding down function.
  • the start physical channel transmission opportunity is the (Occasion_offset+1) th physical channel transmission opportunity in the start radio frame;
  • an index Occasionstart of the start physical channel transmission opportunity is a value obtained according to the following formula, where the formula includes:
  • the radio frame offset of the enhanced physical channel transmission is 0;
  • the subframe offset is an index of the first subframe in the first physical channel transmission opportunity in the radio frame.
  • the physical channel transmission opportunity offset of the enhanced physical channel transmission is 0.
  • the processor is further configured to determine, according to a first threshold, the first information corresponding to each of the one or more enhanced physical channel transmission levels, where the first threshold is determined according to one or more of maximum allowable transmit power of user equipment, initial target preamble received power, an offset value corresponding to a preamble format, a power ramping step, a quantity of preamble transmission attempts, or target physical uplink channel received power.
  • an embodiment of the present disclosure provides a communications device, including: a transmitter, a receiver, a memory, and a processor separately connected to the transmitter, the receiver, and the memory, where:
  • the receiver is configured to receive a preamble sequence
  • the processor is configured to: if the preamble sequence is received on a first resource, determine that the preamble is transmitted in a first mode; or if the preamble sequence is received on a second resource, determine that the preamble is transmitted in a second mode and/or at maximum allowable transmit power, where the first mode is a normal transmission mode or a non-coverage enhanced transmission mode, and the second mode is an enhanced transmission mode.
  • an embodiment of the present disclosure provides user equipment, including: a transmitter, a receiver, a memory, and a processor separately connected to the transmitter, the receiver, and the memory, where:
  • the processor is configured to: determine whether a first parameter value of the user equipment is less than or equal to a first threshold, where the first threshold is determined according to one or more of maximum allowable transmit power of user equipment, initial target preamble received power, an offset value corresponding to a preamble format, a power ramping step, a quantity of preamble transmission attempts, or target physical uplink channel received power; and if the first parameter value of the user equipment is less than or equal to the first threshold, transmit a physical channel by using a first resource and/or in a first mode, where the first mode is a normal transmission mode or a non-coverage enhanced transmission mode; or if the first parameter value of the user equipment is greater than the first threshold, perform enhanced transmission of a physical channel by using a second resource and/or in a second mode, where the second mode is an enhanced transmission mode.
  • a first threshold is determined according to one or more of maximum allowable transmit power of user equipment, initial target preamble received power, an offset value corresponding to a preamble format,
  • the present disclosure provides an enhanced physical channel transmission method, user equipment, and a base station.
  • First information corresponding to each of one or more enhanced physical channel transmission levels is determined, where the first information includes repetition configuration information and enhanced transmission configuration information that are of enhanced transmission of a physical channel; a start radio frame of an enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level and a start position, in the start radio frame, of the enhanced physical channel transmission opportunity are determined according to the first information, where the start position is a start subframe, or the start position is a start physical channel transmission opportunity; and the enhanced transmission of the physical channel is performed by using the start position in the start radio frame as a start point. Therefore, enhanced transmission of a physical channel for terminals of different levels is implemented.
  • FIG. 1 is a flowchart of an enhanced physical channel transmission method according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of an enhanced physical channel transmission method according to another embodiment of the present disclosure.
  • FIG. 3 is a flowchart of an enhanced physical channel transmission method according to still another embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a communications device according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of user equipment according to an embodiment of the present disclosure.
  • FIG. 1 is a flowchart of an enhanced physical channel transmission method according to an embodiment of the present disclosure. As shown in FIG. 1 , the method provided in this embodiment specifically includes the following steps:
  • Step 101 Determine first information corresponding to each of one or more enhanced physical channel transmission levels, where the first information includes repetition configuration information and enhanced transmission configuration information that are of enhanced transmission of a physical channel.
  • this embodiment of the present disclosure may be executed by user equipment (User Equipment, UE for short) or a base station.
  • user equipment User Equipment, UE for short
  • base station User Equipment
  • each of the multiple enhanced physical channel transmission levels is corresponding to different first information.
  • At least one type of information in the first information corresponding to the multiple enhanced physical channel transmission levels is the same.
  • N1+N2 enhanced physical channel transmission levels there are N1+N2 enhanced physical channel transmission levels in total; N1 enhanced physical channel transmission levels are configured by using an enhanced physical channel transmission configuration 1, and the enhanced physical channel transmission configuration 1 is associated with the first piece of physical channel configuration information or the first physical channel configuration index; N2 enhanced physical channel transmission levels are configured by using an enhanced physical channel transmission configuration 2, and the enhanced physical channel transmission configuration 2 is associated with the second piece of physical channel configuration information or the second physical channel configuration index.
  • the physical channel is one or more of a physical random access channel, a physical downlink control channel, an enhanced physical downlink control channel, a physical control format indicator channel, a physical hybrid automatic repeat request indicator channel, a unicast physical downlink shared channel PDSCH, a physical downlink shared channel PDSCH that carries a broadcast or multicast message, a physical uplink shared channel PUSCH, a physical uplink control channel PUCCH, a synchronization channel SCH, or a physical broadcast channel PBCH.
  • the broadcast or multicast message is one or more of a random access response message, a random access response answer Msg3 message, a contention resolution message, system information, or a paging message.
  • the repetition configuration information may be one or more of repetition quantity information, spreading factor information, transmission time interval bundle size information, information about times by which power is increased, or retransmission quantity information.
  • the repetition quantity information determines a repetition quantity;
  • the spreading factor information determines a spreading factor;
  • the transmission time interval bundle size information determines a size of a transmission time interval bundle;
  • the information about times by which power is increased determines the times by which power is increased;
  • the retransmission quantity information determines a retransmission quantity of the enhanced physical channel transmission.
  • the enhanced transmission configuration information may include one or more types of information among configuration information of a time length used for the enhanced transmission, configuration information of a physical channel transmission opportunity in a radio frame, radio frame configuration information of a physical channel transmission opportunity, cycle information of the enhanced transmission, a format used by the physical channel, radio frame offset information of the enhanced transmission, subframe offset information of the enhanced transmission, physical channel transmission opportunity offset information, root sequence index information, high-speed identification information, zero correlation zone configuration information, and frequency offset information.
  • the configuration information of the time length used for the enhanced transmission specifies a quantity of subframes, or duration, or a quantity of radio frames that is occupied by one enhanced physical channel transmission opportunity.
  • the configuration information of a physical channel transmission opportunity in a radio frame determines a quantity of physical channel transmission opportunities included in a radio frame that has a physical channel transmission opportunity.
  • the quantity of physical channel transmission opportunities included in the radio frame that has a physical channel transmission opportunity is ON.
  • ON may also be determined by a subframe number. For example, a value of ON is equal to a value of the subframe number.
  • the radio frame configuration information of a physical channel transmission opportunity determines that all or multiple radio frames have a physical channel transmission opportunity. For example, even-numbered radio frames have a physical channel transmission opportunity, or odd-numbered radio frames have a physical channel transmission opportunity, or all the radio frames have a physical channel transmission opportunity.
  • the radio frame configuration information of a physical channel transmission opportunity determines that there is a physical channel transmission opportunity every RF_D radio frames.
  • the cycle information of the enhanced transmission is used to determine an interval of the enhanced physical channel transmission.
  • a parametric value indicated by the cycle information may be in a unit of a radio frame, or in a unit of a quantity of physical channel transmission opportunities, or in a unit of a quantity of enhanced physical channel transmission opportunities, or in a unit of a repetition quantity, or in a unit of a subframe.
  • the interval of the enhanced physical channel transmission may further be determined according to the cycle information and one or more of the radio frame configuration information of a physical channel transmission opportunity, the repetition quantity information, or the configuration information of a physical channel transmission opportunity in a radio frame.
  • an integer indicated by the cycle information of the enhanced transmission is n
  • the interval of the enhanced physical channel transmission is T.
  • the format used by the physical channel specifies a format used in physical channel transmission. If the physical channel is a physical random access channel, information about the format used by the physical channel specifies a preamble format used by the physical random access channel; if the physical channel is a physical downlink control channel or an enhanced physical downlink control channel, information about the format used by the physical channel specifies a downlink control information format used by the physical downlink control channel or the enhanced physical downlink control channel; if the physical channel is a physical uplink control channel, information about the format used by the physical channel specifies a format used by the physical uplink control channel.
  • a quantity of subframes occupied by single physical channel transmission performed according to the format used in the physical channel transmission is represented by len.
  • the second implementation scenario includes at least two cases, which specifically include:
  • the multiple enhanced physical channel transmission levels are corresponding to same first information, that is, both the repetition configuration information and the enhanced transmission configuration information that are corresponding to the multiple physical channel enhancement transmission levels are the same.
  • a part of the first information corresponding to the multiple enhanced physical channel transmission levels is the same, that is, at least one type of information in the repetition configuration information or the enhanced transmission configuration information or both that are corresponding to the multiple physical channel enhancement levels is the same.
  • At least one type of information among the repetition configuration information of the enhanced physical channel transmission, the configuration information of the time length used for the enhanced physical channel transmission, and the enhanced physical channel transmission cycle information that are corresponding to the multiple enhanced physical channel transmission levels is different.
  • Step 102 Determine, according to the first information, a start radio frame of an enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level and a start position, in the start radio frame, of the enhanced physical channel transmission opportunity, where the start position is a start subframe, or the start position is a start physical channel transmission opportunity.
  • an implementation manner of determining, according to the first information, the start radio frame of the enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level is:
  • a system frame number SFN of the start radio frame is determined according to an enhanced transmission cycle and a radio frame offset.
  • the SFN is a value obtained according to the following formula, where the formula may be:
  • SFN mod (RF_D ⁇ Rep_num/ON) RF_offset, where Rep_num is the repetition quantity, RF_D is determined by the radio frame configuration information of a physical channel transmission opportunity, Occasion_offset is a physical channel transmission opportunity offset, ON is a quantity of physical channel transmission opportunities included in a radio frame that has a physical channel transmission opportunity, RF_offset is a radio frame offset, K is a fixed constant, T is the interval of the enhanced physical channel transmission, m is an integer greater than or equal to 0, floor is a rounding down function, and mod is a modulo function.
  • a start subframe in the start radio frame of the enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level is determined according to the first information.
  • a start physical channel transmission opportunity in the start radio frame of the enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level is determined according to the first information.
  • the first implementation manner that is, that a start subframe in the start radio frame of the enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level is determined according to the first information may specifically include:
  • the start subframe of the enhanced physical channel transmission is the first subframe in the (Occasion_offset+1) th physical channel transmission opportunity in the start radio frame;
  • an index SFstart of the start subframe is a value obtained according to the following formula:
  • the first subframe in the (X+1) th physical channel transmission opportunity in the start radio frame corresponding to each enhanced physical channel transmission level is used as the start subframe, where
  • X mod (m ⁇ Rep_num, ON), Rep_num is the repetition quantity, Occasion_offset is the physical channel transmission opportunity offset, ON is the quantity of physical channel transmission opportunities included in a radio frame that has a physical channel transmission opportunity, T is the enhanced transmission interval, nf is a number of the radio frame, SF_offset is a subframe offset, ns is a number of a timeslot in the start subframe, m is an integer greater than or equal to 0, mod is a modulo function, and floor is a rounding down function.
  • the second implementation manner that is, that a start physical channel transmission opportunity in the start radio frame of the enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level is determined according to the first information may specifically include:
  • the start physical channel transmission opportunity is the (Occasion_offset+1) th physical channel transmission opportunity in the start radio frame;
  • an index Occasionstart of the start physical channel transmission opportunity is a value obtained according to the following formula, where the formula includes:
  • Step 103 Perform the enhanced transmission of the physical channel by using the start position in the start radio frame as a start point.
  • the enhanced transmission of the physical channel is performed by using the start subframe in the start radio frame as the start point.
  • the enhanced transmission of the physical channel is performed by using the start physical channel transmission opportunity in the start radio frame as the start point.
  • first information corresponding to each of one or more enhanced physical channel transmission levels is determined, where the first information includes repetition configuration information and enhanced transmission configuration information that are of enhanced transmission of a physical channel; a start radio frame of an enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level and a start position, in the start radio frame, of the enhanced physical channel transmission opportunity are determined according to the first information, where the start position is a start subframe, or the start position is a start physical channel transmission opportunity; and the enhanced transmission of the physical channel is performed by using the start position in the start radio frame as a start point. Therefore, enhanced transmission of a physical channel for terminals of different levels is implemented.
  • signaling configuration may be radio resource control RRC common signaling configuration and/or RRC dedicated signaling configuration.
  • RRC common signaling configures the repetition quantity information of the enhanced physical channel transmission
  • RRC dedicated signaling also configures the repetition quantity information of the enhanced physical channel transmission.
  • the interval of the enhanced physical channel transmission is determined based on the enhanced physical channel transmission cycle information and the repetition quantity information configured by the RRC dedicated signaling. If the RRC dedicated signaling does not configure the repetition quantity information, the interval of the enhanced physical channel transmission is determined based on the enhanced physical channel transmission cycle information and the repetition quantity information configured by the RRC common signaling.
  • step 102 may further include:
  • the repetition quantity may be determined according to the repetition quantity information and the second parameter information. For example, a product of a value indicated by the repetition quantity information and a value determined by the second parameter is used as the repetition quantity, where the second parameter is determined according to the preamble format or the enhanced physical channel transmission level. For example, there is a predetermined correspondence between the second parameter and the preamble format. Particularly, when the preamble format is 0 or 1, the second parameter is equal to 2. When the preamble format is 2 or 3, the second parameter is equal to 1. A correspondence between the second parameter and the preamble format may also be reflected by using a predefined table.
  • the physical channel is repeatedly transmitted at each of consecutive physical channel transmission opportunities of the repetition quantity by using the start position in the start radio frame as the start point, where Rep_num is the repetition quantity. For example, if it is determined that start positions in the radio frame are subframes numbered 2, 5, and 8, and it is determined that the repetition quantity is 3, the physical channel is repeatedly transmitted at each of three consecutive physical channel transmission opportunities, that is, in subframes numbered 2, 5, and 8.
  • the radio frame offset of the enhanced physical channel transmission is 0;
  • the subframe offset is an index of the first subframe in the first physical channel transmission opportunity in the radio frame.
  • the physical channel transmission opportunity offset of the enhanced physical channel transmission is 0.
  • step 101 may further include:
  • the first threshold is determined according to one or more of maximum allowable transmit power of user equipment, initial target preamble received power, an offset value corresponding to a preamble format, a power ramping step, a quantity of preamble transmission attempts, or target physical uplink channel received power.
  • FIG. 2 is a flowchart of an enhanced physical channel transmission method according to another embodiment of the present disclosure.
  • an applicable scenario of this embodiment is that an interval between start radio frames of two enhanced physical channel transmission opportunities is an integer multiple of a radio frame.
  • There are three enhanced physical channel transmission levels the three enhanced physical channel transmission levels are different, and repetition quantities of the three enhanced physical channel transmission levels are 1, 2, and 4, respectively.
  • the method provided in this embodiment may specifically include the following steps:
  • Step 201 Determine a start radio frame corresponding to each of the three enhanced physical channel transmission levels.
  • the enhanced physical channel transmission cycle information directly indicates an interval of enhanced transmission of a physical channel, that is, n1, n2, and n3 are respectively enhanced transmission intervals corresponding to the three enhanced physical channel transmission levels.
  • the enhanced physical channel transmission cycle information does not directly indicate an interval of enhanced transmission of a physical channel.
  • Step 202 Determine a start subframe corresponding to each of the three enhanced physical channel transmission levels.
  • the first subframe in the first physical channel transmission opportunity in the determined start radio frame corresponding to each enhanced physical channel transmission level is used as the start subframe.
  • Step 203 Perform enhanced transmission of a physical channel by using a start position in the start radio frame as a start point.
  • the enhanced physical channel transmission is performed by using the start subframe in the start radio frame as the start point, where the start subframe in the start radio frame is determined according to steps 201 and 202 .
  • the enhanced physical channel transmission uses Rep_num consecutive physical channel transmission opportunities, and the physical channel is repeatedly transmitted at each physical channel transmission opportunity.
  • determining a start radio frame of an enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level and a start position, in the start radio frame, of the enhanced physical channel transmission opportunity may further include: determining, according to root sequence index information in enhanced transmission configuration information, the start radio frame of the enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level and the start position of the enhanced physical channel transmission opportunity in the start radio frame.
  • the physical channel is a physical random access channel (Physical Random Access Channel, PRACH for short)
  • the enhanced transmission configuration information determines first information, that is, configuration information of a PRACH transmission opportunity in a radio frame, radio frame configuration information of a PRACH transmission opportunity, and a format (that is, a preamble format) used by the PRACH.
  • first information that is, configuration information of a PRACH transmission opportunity in a radio frame, radio frame configuration information of a PRACH transmission opportunity, and a format (that is, a preamble format) used by the PRACH.
  • Table 1 shows a correspondence in a Long Term Evolution (Long Term Evolution, LTE for short) standard between a PRACH configuration index and a preamble format, a system frame number, and a subframe number.
  • LTE Long Term Evolution
  • the format (preamble format) used by the PRACH, the radio frame configuration information (which is determined by the system frame number) of a PRACH transmission opportunity, and the configuration information (which is determined by the subframe number) of a PRACH transmission opportunity in a radio frame may be determined according to the PRACH configuration index.
  • SF_offset may also be determined by the subframe number.
  • SF_offset is a first value of the subframe number.
  • the configuration information of a PRACH transmission opportunity in a radio frame or SF_offset or both are determined by (f RA , t RA (0) , t RA (1) , t RA (2) ).
  • a start subframe corresponding to each enhanced PRACH transmission level is the first subframe in the first PRACH transmission opportunity in a start radio frame.
  • the subframe 2 is used as the start subframe.
  • L is an integer greater than or equal to 0, and what inside 0 indicates a subframe included in one PRACH transmission opportunity.
  • FIG. 3 is a flowchart of an enhanced physical channel transmission method according to still another embodiment of the present disclosure. As shown in FIG. 3 , an applicable scenario of this embodiment is that an interval between start radio frames of two enhanced physical channel transmission opportunities is not limited to an integer multiple of a radio frame.
  • Step 301 Determine a start radio frame corresponding to each enhanced physical channel transmission level.
  • a system frame number SFN of a start radio frame of an enhanced physical channel transmission opportunity corresponding to an enhanced physical channel transmission level i is equal to an SFN determined by the following formula:
  • Parameters RF_D, Occasion_offset, RF_offset, Rep_num, ON, and T are the same as described above.
  • Rep_num ⁇ len may further be used to substitute for Rep_num in the foregoing formula.
  • ON ⁇ len may further be used to substitute for ON.
  • Step 302 Determine a start position, in the start radio frame, of an enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level.
  • step 302 There are at least two following implementation manners of step 302 in this embodiment:
  • a start subframe of enhanced physical channel transmission may be obtained in the following manner:
  • a start physical channel transmission opportunity of enhanced physical channel transmission may be determined in the following manner:
  • Step 303 Perform enhanced physical channel transmission according to the start position in the determined start radio frame.
  • the enhanced physical channel transmission uses Rep_num consecutive physical channel transmission opportunities, and the physical channel is repeatedly transmitted at each physical channel transmission opportunity.
  • the physical channel is a physical random access channel PRACH.
  • First information includes repetition quantity information of enhanced PRACH transmission, and the repetition quantity information of the enhanced PRACH transmission determines a repetition quantity of the enhanced PRACH transmission.
  • I is a positive integer greater than 0.
  • An enhanced PRACH transmission configuration determines enhanced PRACH transmission repetition quantity information corresponding to the I enhanced PRACH transmission levels, that is, the enhanced PRACH transmission configuration determines enhanced PRACH transmission repetition quantity information corresponding to all of the I enhanced PRACH transmission levels.
  • repetition quantities determined by the enhanced PRACH transmission repetition quantity information that is corresponding to all of the I enhanced PRACH transmission levels and that is determined by the enhanced PRACH transmission configuration are: Rep_num1, Rep_num2, . . . , Rep_numI.
  • one piece of PRACH configuration information or one PRACH configuration index is associated with one enhanced PRACH transmission configuration. That is, one piece of PRACH configuration information or one PRACH configuration index is associated with enhanced PRACH transmission repetition quantity information corresponding to N enhanced PRACH transmission levels.
  • the first information further includes one or more of configuration information of a PRACH transmission opportunity in a radio frame, radio frame configuration information of a PRACH transmission opportunity, a format used by the PRACH, radio frame offset information of the enhanced PRACH transmission, subframe offset information of the enhanced PRACH transmission, enhanced PRACH transmission cycle information, or PRACH transmission opportunity offset information of the enhanced PRACH transmission.
  • One or more of the radio frame offset information of the enhanced PRACH transmission, the subframe offset information of the enhanced PRACH transmission, the PRACH transmission opportunity offset information of the enhanced PRACH transmission, or the enhanced PRACH transmission cycle information may be determined by PRACH configuration information or be predefined.
  • one PRACH configuration index or PRACH configuration information determines the following information in the first information: the configuration information of a PRACH transmission opportunity in a radio frame, the radio frame configuration information of a PRACH transmission opportunity, and the format (that is, a preamble format) used by the PRACH.
  • the format (preamble format) used by the PRACH, the radio frame configuration information (which is determined by a system frame number) of a PRACH transmission opportunity, and the configuration information (which is determined by a subframe number) of a PRACH transmission opportunity in a radio frame are determined according to one PRACH configuration index.
  • a start radio frame of an enhanced physical channel transmission opportunity corresponding to an enhanced PRACH transmission level 1 is:
  • a start radio frame of an enhanced physical channel transmission opportunity corresponding to an enhanced PRACH transmission level 2 is:
  • a start radio frame of an enhanced physical channel transmission opportunity corresponding to an enhanced PRACH transmission level 3 is:
  • an SFN of the start radio frame of the enhanced physical channel transmission opportunity corresponding to the enhanced PRACH transmission level 1 is:
  • An SFN of the start radio frame of the enhanced physical channel transmission opportunity corresponding to the enhanced PRACH transmission level 2 is:
  • An SFN of the start radio frame of the enhanced physical channel transmission opportunity corresponding to the enhanced PRACH transmission level 3 is:
  • a start subframe in the start radio frame corresponding to each enhanced physical channel transmission level is determined.
  • the start subframe in the start radio frame of the enhanced physical channel transmission opportunity corresponding to the enhanced PRACH transmission level 1 is:
  • the start subframe in the start radio frame of the enhanced physical channel transmission opportunity corresponding to the enhanced PRACH transmission level 2 is:
  • the start subframe in the start radio frame of the enhanced physical channel transmission opportunity corresponding to the enhanced PRACH transmission level 3 is:
  • RF_D is determined by density per 10 ms Density Per 10 ms indicated by a physical random access channel configuration index PRACH Configuration Index
  • ON is determined by a four-tuple indicated by the physical random access channel configuration index and uplink and downlink configuration information of TDD, or ON is determined by and a random access preamble format indicated by the physical random access channel configuration index.
  • parameters in formulas in the present disclosure are determined first information corresponding to an enhanced physical channel transmission level, and a start subframe or a start physical channel transmission opportunity, and a start radio frame that are of enhanced physical channel transmission corresponding to the enhanced physical channel transmission level and that are determined according to the first information.
  • a start subframe or a start physical channel transmission opportunity, and a start radio frame that are of enhanced physical channel transmission corresponding to each enhanced physical channel transmission level need to be determined according to first information corresponding to the enhanced physical channel transmission level.
  • one or more parameters in the foregoing formulas may be associated with the enhanced physical channel transmission level i, that is, there is a functional relationship between the parameter and i.
  • there may also be one or more parameters in the foregoing formulas are not associated with the enhanced physical channel transmission level i, that is, there is no functional relationship between the parameter and i.
  • An embodiment of the present disclosure provides a method for determining a physical channel mode, where the method includes:
  • the preamble sequence is received on a first resource, determining that the preamble is transmitted in a first mode; or if the preamble sequence is received on a second resource, determining that the preamble is transmitted in a second mode and/or at maximum allowable transmit power, where the first mode is a normal transmission mode or a non-coverage enhanced transmission mode, and the second mode is an enhanced transmission mode.
  • An embodiment of the present disclosure provides a method for determining a physical channel mode, where the method includes:
  • determining whether a first parameter value of user equipment is less than or equal to a first threshold where the first threshold is determined according to one or more of maximum allowable transmit power of user equipment, initial target preamble received power, an offset value corresponding to a preamble format, a power ramping step, a quantity of preamble transmission attempts, or target physical uplink channel received power; and
  • the first parameter value of the user equipment if the first parameter value of the user equipment is less than or equal to the first threshold, transmitting a physical channel by using a first resource and/or in a first mode, where the first mode is a normal transmission mode or a non-coverage enhanced transmission mode; or if the first parameter value of the user equipment is greater than the first threshold, performing enhanced transmission of a physical channel by using a second resource and/or in a second mode, where the second mode is an enhanced transmission mode.
  • An embodiment of the present disclosure provides a method, where the method includes:
  • first transmit power is final transmit power at which the preamble is transmitted according to a level n, and n is an integer
  • the second transmit power is transmit power at which the preamble is transmitted according to a level n+1.
  • the level is one or more of a repetition level, a resource level, a level, an enhancement level, a repetition quantity, a coverage enhanced value, a level of detection of a pre-specified channel, or times of detection of a pre-specified channel.
  • the determining second transmit power according to the first transmit power further includes: determining the second transmit power according to the first transmit power and second information, where the second information is one or more of power ramping, a first power offset, or a first preamble attempt quantity.
  • the first power offset may be a fixed power offset or a level-related power offset.
  • the final transmit power at which the preamble is transmitted according to the level n is highest transmit power obtained after the preamble performs power ramping according to the level n or maximum transmit power at which the preamble is transmitted according to the level n.
  • the transmit power at which the preamble is transmitted according to the level n+1 is initial transmit power at which the preamble is transmitted according to the level n+1 or transmit power at which the preamble is transmitted for the m th time according to the level n+1, where m is a positive integer.
  • the level 0 is a level when the preamble is not repeatedly transmitted.
  • a level 1 is a level when the preamble is not repeatedly transmitted, but at least one of a preamble, a time, or a frequency resource configured for preamble transmission performed by using the level 1 is different from at least one of a preamble, a time, or a frequency resource configured for preamble transmission performed by using the level 0; or the level 1 is a lowest level at which the preamble is repeatedly transmitted or a first level at which the preamble is repeatedly transmitted.
  • the level n (n>1) is a level at which the preamble is repeatedly transmitted.
  • the level 0 is the level when the preamble is not repeatedly transmitted, and then final transmit power at which the preamble is transmitted according to the level 0 is a maximum value of PPRACH, where PPRACH is transmit power at which the preamble is transmitted according to the level 0, and PPRACH is determined according to one or more of maximum allowable transmit power of user equipment, a target preamble received power, or a path loss.
  • PPRACH is determined according to the following formula:
  • PPRACH min ⁇ P CMAX,c (i), PREAMBLE_RECEIVED_TARGET_POWER+PL c ⁇ _[dBm]
  • P CMAX,c (i) is the maximum allowable transmit power of the user equipment
  • PREAMBLE_RECEIVED_TARGET_POWER is the target preamble received power
  • PL c is the path loss
  • min is a minimum function.
  • the second transmit power “PPRACH, n+1” at which the preamble is transmitted according to the level n+1 may be determined according to the following formula:
  • P CMAX,c (i) is the maximum allowable transmit power of the user equipment
  • PPRACHmax, n is the final transmit power at which the preamble is transmitted according to the level n
  • DELTA_LEVEL is the first power offset
  • min is a minimum function.
  • the second transmit power “PPRACH, n+1” at which the preamble is transmitted according to the level n+1 may be determined according to the following formula:
  • PPRACH, n+1 min ⁇ P CMAX,c (i), PPRACHmax, n+DELTA_LEVEL+(PREAMBLE_TRANSMISSION_COUNTER_CURRENTLEVEL ⁇ 1) powerRampingStep ⁇
  • P CMAX,c (i) is the maximum allowable transmit power of the user equipment
  • PPRACHmax, n is the final transmit power at which the preamble is transmitted according to the level n
  • DELTA_LEVEL is the first power offset
  • PREAMBLE_TRANSMISSION_COUNTER_CURRENTLEVEL is a quantity of times of preamble transmission performed according to the level n+1
  • powerRampingStep is a power ramping step
  • min is a minimum function.
  • An embodiment of the present disclosure provides a manner of determining PRACH transmission and/or enhanced PRACH transmission level information, where the manner specifically includes:
  • first information is one or more of a path loss between UE and a network side, reference signal received power, a master information block, a system information block, or a measurement quantity that can reflect a path loss or channel quality;
  • the initial level of the PRACH transmission is a level 0; if the first information is greater than or equal to the first threshold, or the first information is determined by using a second predefined rule, the initial level of PRACH transmission is a level 1; or
  • the initial level of PRACH transmission is the level 0; if the first information is determined by using the second predefined rule, the initial level of PRACH transmission is the level 1; or
  • the initial level of PRACH transmission is the level 0; if the first information is determined by using the second predefined rule, the initial level of PRACH transmission is the level 1.
  • the first threshold is a predefined threshold or a threshold configured by a system.
  • the enhancement is one or more of repeated transmission, spread spectrum transmission, or time interval bundling transmission.
  • the first rule is that the UE obtains main information by receiving an unenhanced master information block, and/or obtains system information by receiving an unenhanced system information block.
  • the second rule is that the UE obtains main information by receiving an enhanced master information block, and/or obtains system information by receiving an enhanced system information block.
  • the performing PRACH transmission according to the initial level is: if random access of a PRACH by using a current level is unsuccessful, performing PRACH transmission by adding one level.
  • the level 0 is a level when the preamble is not repeatedly transmitted.
  • the level 1 is the level when the preamble is not repeatedly transmitted, but at least one of a preamble, a time, or a frequency resource configured for preamble transmission performed by using the level 1 is different from at least one of a preamble, a time, or a frequency resource configured for preamble transmission performed by using the level 0; or the level 1 is a lowest level at which the preamble is repeatedly transmitted or a first level at which the preamble is repeatedly transmitted.
  • a level n (n>1) is a level at which the preamble is repeatedly transmitted.
  • PRACH transmission has levels 0, 1, 2, and 3; if a path loss between the UE and a base station ⁇ x dB, it is determined that PRACH transmission is performed by using the level 0 as the initial level; if random access of the UE by using the level 0 is unsuccessful, the UE performs PRACH transmission by progressively adding a level (for example, by using the level 1).
  • the path loss between the UE and the base station >x1 dB (x1 may be the same as x, or may be different from x)
  • FIG. 4 is a schematic structural diagram of a communications device according to an embodiment of the present disclosure.
  • the communications device includes: a transmitter 401 , a receiver 402 , a memory 403 , and a processor 404 separately connected to the transmitter 401 , the receiver 402 , and the memory 403 .
  • the processor 404 is configured to: determine first information corresponding to each of one or more enhanced physical channel transmission levels, where the first information includes repetition configuration information and enhanced transmission configuration information that are of enhanced transmission of a physical channel; determine, according to the first information, a start radio frame of an enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level and a start position, in the start radio frame, of the enhanced physical channel transmission opportunity, where the start position is a start subframe, or the start position is a start physical channel transmission opportunity; and perform the enhanced transmission of the physical channel by using the start position in the start radio frame as a start point.
  • first information corresponding to each of one or more enhanced physical channel transmission levels is determined, where the first information includes repetition configuration information and enhanced transmission configuration information that are of enhanced transmission of a physical channel; a start radio frame of an enhanced physical channel transmission opportunity corresponding to each enhanced physical channel transmission level and a start position, in the start radio frame, of the enhanced physical channel transmission opportunity are determined according to the first information, where the start position is a start subframe, or the start position is a start physical channel transmission opportunity; and the enhanced transmission of the physical channel is performed by using the start position in the start radio frame as a start point. Therefore, enhanced transmission of a physical channel for terminals of different levels is implemented.
  • the enhanced transmission configuration information includes one or more types of information among configuration information of a time length used for the enhanced transmission, configuration information of a physical channel transmission opportunity in a radio frame, radio frame configuration information of a physical channel transmission opportunity, cycle information of the enhanced transmission, a format used by the physical channel, radio frame offset information of the enhanced transmission, subframe offset information of the enhanced transmission, physical channel transmission opportunity offset information, root sequence index information, high-speed identification information, zero correlation zone configuration information, and frequency offset information.
  • At least one type of information in the first information corresponding to the multiple enhanced physical channel transmission levels is the same.
  • At least one type of information among the configuration information of a physical channel transmission opportunity in a radio frame, the radio frame configuration information of a physical channel transmission opportunity, the format used by the physical channel, the radio frame offset information of the enhanced physical channel transmission, the subframe offset information of the enhanced physical channel transmission, the physical channel transmission opportunity offset information of the enhanced physical channel transmission, the root sequence index information, the high-speed identification information, the zero correlation zone configuration information, and the frequency offset information that are corresponding to the multiple enhanced physical channel transmission levels is the same.
  • At least one type of information among the repetition configuration information of the enhanced physical channel transmission, the configuration information of the time length used for the enhanced physical channel transmission, and the enhanced physical channel transmission cycle information that are corresponding to the multiple enhanced physical channel transmission levels is different.
  • an interval of the enhanced physical channel transmission is determined according to one or more types of information among the cycle information, the radio frame configuration information, the repetition configuration information, and the configuration information of a physical channel transmission opportunity in a radio frame.
  • the processor 204 is further configured to: determine a repetition quantity of the enhanced transmission of the physical channel according to one or more types of information among the repetition configuration information, the radio frame configuration information, and the configuration information of a physical channel transmission opportunity in a radio frame; or determine a repetition quantity of the enhanced transmission of the physical channel according to the repetition configuration information and second parameter information, where a second parameter is a parameter determined according to a preamble format or the enhanced physical channel transmission level.
  • the processor 404 is specifically configured to repeatedly transmit the physical channel at each of consecutive physical channel transmission opportunities of the repetition quantity by using the start position in the radio frame as the start point.
  • a system frame number SFN of the start radio frame is determined according to an enhanced transmission cycle and a radio frame offset.
  • the SFN is a value obtained according to the following formula:
  • SFN mod the interval of the enhanced physical channel transmission
  • 10 ⁇ SFN+SFstart ⁇ SF_offset) mod T 0
  • SF_offset is a subframe offset
  • SFstart is an index of the start subframe
  • T is the interval of the enhanced physical channel transmission
  • mod is a modulo function
  • SFN mod (RF_D ⁇ Rep_num/ON) RF_offset, where Rep_num is the repetition quantity, RF_D is determined by the radio frame configuration information of a physical channel transmission opportunity, Occasion_offset is a physical channel transmission opportunity offset, ON is a quantity of physical channel transmission opportunities included in a radio frame that has a physical channel transmission opportunity, RF_offset is a radio frame offset, K is a fixed constant, T is the interval of the enhanced physical channel transmission, m is an integer greater than or equal to 0, floor is a rounding down function, and mod is a modulo function.
  • the start subframe of the enhanced physical channel transmission is the first subframe in the (Occasion_offset+1) th physical channel transmission opportunity in the start radio frame;
  • an index SFstart of the start subframe is a value obtained according to the following formula:
  • the first subframe in the (X+1) th physical channel transmission opportunity in the start radio frame corresponding to each enhanced physical channel transmission level is used as the start subframe, where
  • X mod (m ⁇ Rep_num, ON), Rep_num is the repetition quantity, Occasion_offset is a physical channel transmission opportunity offset, ON is a quantity of physical channel transmission opportunities included in a radio frame that has a physical channel transmission opportunity, T is the enhanced transmission interval, of is a number of the radio frame, SF_offset is a subframe offset, ns is a number of a timeslot in the start subframe, m is an integer greater than or equal to 0, mod is a modulo function, and floor is a rounding down function.
  • the start physical channel transmission opportunity is the (Occasion_offset+1) th physical channel transmission opportunity in the start radio frame;
  • an index Occasionstart of the start physical channel transmission opportunity is a value obtained according to the following formula, where the formula includes:
  • the radio frame offset of the enhanced physical channel transmission is 0;
  • the subframe offset is an index of the first subframe in the first physical channel transmission opportunity in the radio frame.
  • the physical channel transmission opportunity offset of the enhanced physical channel transmission is 0.
  • the processor 404 is further configured to determine, according to a first threshold, the first information corresponding to each of the one or more enhanced physical channel transmission levels, where the first threshold is determined according to one or more of maximum allowable transmit power of user equipment, initial target preamble received power, an offset value corresponding to a preamble format, a power ramping step, a quantity of preamble transmission attempts, or target physical uplink channel received power.
  • FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • the base station includes: a transmitter 501 , a receiver 502 , a memory 503 , and a processor 504 separately connected to the transmitter 501 , the receiver 502 , and the memory 503 .
  • the receiver 502 is configured to receive a preamble sequence.
  • the processor 504 is configured to: if the preamble sequence is received on a first resource, determine that the preamble is transmitted in a first mode; or if the preamble sequence is received on a second resource, determine that the preamble is transmitted in a second mode and/or at maximum allowable transmit power, where the first mode is a normal transmission mode or a non-coverage enhanced transmission mode, and the second mode is an enhanced transmission mode.
  • FIG. 6 is a schematic structural diagram of user equipment according to an embodiment of the present disclosure.
  • the user equipment includes: a transmitter 601 , a receiver 602 , a memory 603 , and a processor 604 separately connected to the transmitter 601 , the receiver 602 , and the memory 603 .
  • the processor 604 is configured to: determine whether a first parameter value of the user equipment is less than or equal to a first threshold, where the first threshold is determined according to one or more of maximum allowable transmit power of user equipment, initial target preamble received power, an offset value corresponding to a preamble format, a power ramping step, a quantity of preamble transmission attempts, or target physical uplink channel received power; and if the first parameter value of the user equipment is less than or equal to the first threshold, transmit a physical channel by using a first resource and/or in a first mode, where the first mode is a normal transmission mode or a non-coverage enhanced transmission mode; or if the first parameter value of the user equipment is greater than the first threshold, perform enhanced transmission of a physical channel by using a second resource and/or in a second mode, where the second mode is an enhanced transmission mode.
  • the program may be stored in a computer-readable storage medium.
  • the foregoing storage medium includes: any medium that can store program code, such as a ROM, a RAM, a magnetic disk, or an optical disc.

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